Recently, Ports on the Nexus1000v became blocked after performing a Nexus 1000v Upgrade.
After the upgrade a whole bunch of the VMs lost network connectivity, whilst IP Storage Etc.. Stayed up
In vCenter, Under Networking the Ports on the DvSwitch were showing as blocked
To confirm this, Putty onto the ESXi Server (Remember, you will need to enable SSH first)
Run:
~ # vemcmd show port
This showed that the Port state was BLK (Blocked)
LTL VSM Port Admin Link State PC-LTL SGID Vem Port Type 20 Eth3/4 UP UP BLK 561 3 vmnic3 49 Veth1 UP UP FWD 0 3 vmk1 50 Veth3 UP UP FWD 0 3 vmk2 VXLAN 51 Veth5 UP UP FWD
Log into the Nexus1000v with PuTTy
Run:
shows svs connections
Results:
connection <vCenter Server>: IP:<IP Address> remote port: 80 protocol: vmware-vim https certificate: default datacenter name: <Datacenter Name> DVS uuid: 9b dd 36 50 2e 27 27 8b-07 ed 81 89 ef 43 31 17 config status: Enabled operational status: Disconnected sync status: - version: -
The problem here is that operational status: disconnected means that it is not connected to vCenter
NOTE: Here we noticed that the Datacenter name in Nexus was different to what it was in vCenter. The name was the same but the name in vCenter was in Capitals and in Nexus it was lowercase.
After changing in vCenter, run:
n1000v# conf t n1000v(config)# svs connection <Data Centre Name> n1000v(config-svs-conn)# connect
Run:
shows svs connections
Results:
connection <vCenter Server>: IP:<IP Address> remote port: 80 protocol: vmware-vim https certificate: default datacenter name: <Datacenter Name> DVS uuid: 9b dd 36 50 2e 27 27 8b-07 ed 81 89 ef 43 31 17 config status: Enabled operational status: Connected sync status: - version: -
It took rebooting each ESXi Host for the Ports to come back up again
